It also does not work if the on-demand synchronization is switched off (I could not synchronize).
Even after setting up the server again (I just wasted my time).
No matter which setting I made on the client or server (I just wasted my time again).
I could only syncronize again after uninstalling KB 4592438.
How can such a mistake not be noticed at Microsoft? Before an update comes out?
I'm really angry.